Use silver boats -- these are more trouble to later remove from the furnace but they do no corrode. --Carol At 09:37 AM 9/23/99 -0400, you wrote: >Dear Listmembers, > >I am trying to analyze some atm NH4 samples for N-15 that were collected in >denuders and washed out of the collector with sulfuric acid. NH4 samples >in HCl freeze-dry nicely, can be rehydraded with a drop of RO water and >placed on chemsorb particles for analysis in a EA-CFIRMS. Does anyone have >a technique for analyzing NH4 samples trapped in sulfuric acid? What >happens if you inject conc sulfuric acid into the EA combustion column? > >Thanks for any help. > >Bill Showers >---------------------------------------------------------- >William J. Showers >Associate Professor >Dept. of Marine, Earth, & Atm Sciences >North Carolina State University > >(919) 515-7143 - voice >(919) 515-7802 - fax >[log in to unmask] - email >